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Date: Wed, 11 Apr 2001 18:13:10 +0200
From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Zdenek Kabelac <kabi@i.am>, linux-kernel@vger.kernel.org
Subject: Re: No 100 HZ timer !
Message-ID: <20010411181310.C23974@pcep-jamie.cern.ch>
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In-Reply-To: <Pine.GSO.3.96.1010411123424.2984D-100000@delta.ds2.pg.gda.pl>; from macro@ds2.pg.gda.pl on Wed, Apr 11, 2001 at 01:42:45PM +0200
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Maciej W. Rozycki wrote:
> On Tue, 10 Apr 2001, Zdenek Kabelac wrote:
> 
> > I think it would be wrong if we could not add new very usable features
> > to the system just because some old hardware doesn't support it.
> 
>  s/old/crappy/ -- even old hardware can handle vsync IRQs fine.  E.g. TVGA
> 8900C. 

Think of the original 64k and 256k VGA cards.  I think some of those
didn't have an irq, but did have a way to read the progress of the
raster, which you could PLL to using timer interrupts.  Some video games
still look fine at 320x200 :-)

-- Jamie
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